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rc51racer0023 06-27-2006 08:06 AM

1997 wrangler 2.5 power loss
I have a 1997 wrangler 2.5 se that has 150,00 miles. Recenlty I have noticed a huge decline in power. Any small hills or hiway driving is were the power loss is most noticable. I have changed the plugs, cap and rotor, wires, coil and pickup coil. This made no improvement. It seems to be running a little on the rich side and my gas mileage has also stared to decline a little. The computer is throwing no codes at this time I checked and so did my loccal parts store. I am puzzled and help would be grealty appriciated.

bluvikng 06-27-2006 09:30 AM

Try this, and report back. Buy a couple of cans of Berryman's carb cleaner, and give that throttle body a good cleaning. Spray all the linkages on the outside as well. Over time, things get very sticky inside and out, of your throttle body. Make sure all your vacuum lines are in good shape as well. Let us know how that works for you.

mrbigjeep 06-27-2006 07:18 PM

good idea...i've heard that has worked for a lot of people

4Jeepn 06-27-2006 08:25 PM

Also, have you replaced the fuel filter?

rc51racer0023 06-28-2006 06:08 PM

I cleaned the throttle body with the berrymans carb cleaner and the thing was very dirty. I noticed alittle power gain but am still falling short on the hiway. I can do about 60 and thats it. Any other help would be greatly appricaited. I have not changed the fuel filter yet, can somebody tell me were it is located. Are there any other vacuum lines besides the one that runs the heater controlls that is the only one I can find. I am also wondering if i can test the pressure in the fuel line. Thanks for the help guys.

bluvikng 06-28-2006 10:00 PM

I will let someone else help you, as I know very little about the 2.5 engine. I don't have one to help guide you through this. There are plenty of members that have this engine, and was hoping that they would jump in here and give you some more ideas.

rc51racer0023 06-29-2006 03:00 AM

thanks for the help and idea bluvikng.

nascardude68 07-01-2006 09:52 AM

have your catylic converter checked out. it could be stopped up

mrbigjeep 07-01-2006 10:01 PM

would be a good idea...and you can always go to a high flow catalytic converter if that was the prob and wanted a new one

rc51racer0023 07-02-2006 01:30 AM

If my cat is plugged can i just modify it and take out the guts and run it that way. I am planning on taking a look at the cat today. I will let you know what i find

willness33 07-02-2006 01:48 AM

Visually, you may not be able to tell if the cat is bad. When you crawl under there, give it a good whack with something non-metallic, but heavy. If it rattles, that very well could be your problem. Also, be careful to make sure you haven't run the jeep for a while. Cats get very hot and hold heat way longer than anything else under there. Ask me how I know. BTW, the fuel filter is in the tank just like the 4.0s.

rc51racer0023 08-03-2006 11:26 AM

Justed wanted to say thanks to everyone for their help. I replaced the cat and that fixed the problem and my jeep is as good as new thanks again

staticat 01-15-2014 07:21 PM

Same issue
I have the same issue loss of power on hills I just replace the engine as the other one blew. I thought my check engine light would come on if the cat was bad. I replaced everything else including upgrading the throttle body.

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